Non-classical microwave-optical photon pair generation with a chip-scale transducer

被引:15
作者
Meesala, Srujan [1 ,2 ]
Wood, Steven [1 ,2 ]
Lake, David [1 ,2 ]
Chiappina, Piero [1 ,2 ]
Zhong, Changchun [3 ,6 ]
Beyer, Andrew D. [4 ]
Shaw, Matthew D. [4 ]
Jiang, Liang [3 ]
Painter, Oskar [1 ,2 ,5 ]
机构
[1] CALTECH, Kavli Nanosci Inst & Thomas J Watson Sr, Lab Appl Phys, Pasadena, CA 91125 USA
[2] CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
[3] Univ Chicago, Pritzker Sch Mol Engn, Chicago, IL USA
[4] CALTECH, Jet Prop Lab, Pasadena, CA USA
[5] Amazon Web Serv, Ctr Quantum Comp, Pasadena, CA 91106 USA
[6] Xi An Jiao Tong Univ, Dept Phys, Xian, Peoples R China
基金
中国国家自然科学基金;
关键词
QUANTUM STATE TRANSFER; SUPERCONDUCTING-QUBIT; ENTANGLEMENT; COMMUNICATION; NOISE;
D O I
10.1038/s41567-024-02409-z
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Modern computing and communication technologies such as supercomputers and the Internet are based on optically connected networks of microwave-frequency information processors. An analogous architecture has been proposed for quantum networks, using optical photons to distribute entanglement between remote superconducting quantum processors. Here we report a step towards such a network by observing non-classical correlations between photons in an optical link and a superconducting quantum device. We generate these states of light through a spontaneous parametric down-conversion process in a chip-scale piezo-optomechanical transducer, and we measure a microwave-optical cross-correlation exceeding the Cauchy-Schwarz classical bound for thermal states. As further evidence of the non-classical character of the microwave-optical photon pairs, we observe antibunching in the microwave state conditioned on detection of an optical photon. Such a transducer can be readily connected to an independent superconducting qubit module and serve as a key building block for optical quantum networks of microwave-frequency qubits. A transducer that generates microwave-optical photon pairs is demonstrated. This could provide an interface between optical communication networks and superconducting quantum devices that operate at microwave frequencies.
引用
收藏
页码:871 / 877
页数:8
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